GRAVITY faint: reducing noise sources in GRAVITY+ with a fast metrology attenuation system
GRAVITY faint: reducing noise sources in GRAVITY+ with a fast metrology attenuation system
With the upgrade from GRAVITY to GRAVITY+ the instrument will evolve to an all-sky interferometer that can observe faint targets, such as high redshift AGN. Observing the faintest targets requires reducing the noise sources in GRAVITY as much as possible. The dominant noise source, especially in the blue part of …